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Light source apparatus and projector

a technology of light source and projector, which is applied in the direction of lighting and heating equipment, instruments, fibre light guides, etc., can solve the problems of increasing the size of the light source apparatus

Active Publication Date: 2020-05-28
SEIKO EPSON CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The present patent relates to a light source apparatus that combines two different lights to produce white light. The apparatus includes a laser light source, a light guide, a wavelength converter containing a phosphor, and a light combiner. The light guide and the wavelength converter are placed next to each other, and the first light enters the light guide at one end and the second light enters the wavelength converter at the other end. The light guide and the wavelength converter are designed to be adjacent to each other, and the lengthwise direction of the light guide is parallel to the lengthwise direction of the wavelength converter. The apparatus can produce white light with high efficiency and can be used in a projector.

Problems solved by technology

As a result, there is a problem of an increase in the size of the light source apparatus.
Further, generating color light other than white light also requires an optical system for combining the fluorescence with light having another color and has the problem of an increase in the size of the light source apparatus.

Method used

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Examples

Experimental program
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first embodiment

[0026]A first embodiment of the present disclosure will be described below with reference to FIGS. 1 and 2.

[0027]A projector according to the present embodiment is an example of a liquid crystal projector using a liquid crystal panel as a light modulator.

[0028]In the following drawings, components are drawn at different dimensional scales in some cases for clarity of each of the components.

[0029]FIG. 1 is a schematic configuration diagram of a projector 1 according to the first embodiment.

[0030]The projector 1 according to the first embodiment is a projection-type image display apparatus that projects a color image on a screen (projection receiving surface) SCR. The projector 1 uses three light modulators corresponding to color light formed of red light LR, green light LG, and blue light LB.

[0031]The projector 1 includes a light source apparatus 2, a uniform illumination system 40, a color separation system 3, a light modulator 4R, a light modulator 4G, a light modulator 4B, a light...

second embodiment

[0095]A second embodiment of the present disclosure will be described below with reference to FIG. 6.

[0096]A light source apparatus according to the second embodiment has the same basic configuration as that in the first embodiment, and the configuration of the divergence angle adjuster differs from that in the first embodiment. The entire configuration of the light source apparatus will therefore not be described.

[0097]FIG. 6 is a schematic configuration diagram of a light source apparatus 16 according to the second embodiment.

[0098]In FIG. 6, components common to those in FIG. 2 have the same reference characters and will not be described.

[0099]The light source apparatus 16 includes the light guiding rod 51 (light guide), a divergence angle adjusting member 72, the wavelength conversion rod 58 (wavelength converter), the first light source 61, the second light source 62, the light combiner 53, the angle converter 56, and the collimator lens 57, as shown in FIG. 6.

[0100]The diverge...

third embodiment

[0105]A third embodiment of the present disclosure will be described below with reference to FIG. 7.

[0106]A light source apparatus according to the third embodiment has the same basic configuration as that in the first embodiment, and the position of the first light source apparatus and the configuration of the divergence angle adjuster differ from those in the first embodiment. The entire configuration of the light source apparatus will therefore not be described.

[0107]FIG. 7 is a schematic configuration diagram of a light source apparatus 18 according to the third embodiment.

[0108]In FIG. 7, components common to those in FIG. 2 have the same reference characters and will not be described.

[0109]The light source apparatus 18 includes the light guiding rod 51 (light guide), the wavelength conversion rod 58 (wavelength converter), the first light source 61, the second light source 62, the light combiner 53, the angle converter 56, and the collimator lens 57, as shown in FIG. 7.

[0110]T...

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Abstract

A light source apparatus according to an aspect of the present disclosure includes a first light source that emits first light, a second light source that emits second light, a light guide that causes the first light emitted from the first light source to propagate, a wavelength converter containing a phosphor that emits fluorescence when excited with the second light emitted from the second light source, and a light combiner that combines the first light having exited out of the light guide with the fluorescence having exited out of the wavelength converter. The light guide and the wavelength converter are disposed side by side. The light guide has a first end section and a second end section. The wavelength converter has a third end section and a fourth end section. The first light enters the light guide via the first end section thereof.

Description

[0001]The present application is based on, and claims priority from JP Application Serial Number 2018-219522, filed Nov. 22, 2018, the disclosure of which is hereby incorporated by reference herein in its entirety.BACKGROUND1. Technical Field[0002]The present disclosure relates to a light source apparatus and a projector.2. Related Art[0003]As a light source apparatus used in a projector, there has been a proposed light source apparatus using fluorescence emitted from a phosphor when the phosphor is irradiated with excitation light emitted from a light emitting device. JP-T-2017-536664 discloses an illuminator including a rod-shaped ceramic element providing a wavelength conversion effect and a light emitting diode (LED) that emits excitation light and so configured that the excitation light is caused to enter the ceramic element via a side surface thereof and the resultant converted light is extracted via an end surface of the ceramic element.[0004]As described in JP-T-2017-536664,...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): G03B21/20F21V8/00
CPCG03B21/2013G03B21/204G02B6/0006G02B6/0008G03B21/208G03B33/12G02B6/0068G02B6/0076F21Y2115/30
Inventor SAKATA, HIDEFUMISUZUKI, JUNICHIKOMIYAMA, SHINGOIWAMA, YUICHIRO
Owner SEIKO EPSON CORP